"She might have just been starting out as a comedian but the audience did not reflect that."

Ms Dixon's friend and fellow comedian Kieran Butler told the Herald Sun the young artist was about to "break new ground".

"I told her that to her face about 25 times," he said. "She was so young, she had time on her side."

Videos of Ms Dixon performing appear on YouTube. Her last post on Facebook was an invitation for friends to attend her show on Tuesday night.

"You guys should come along and watch," she wrote. "It will be a good night."

Paramedics who were called to the scene worked on Ms Dixon but were unable to revive her. Police sealed off the area and SES volunteers combed the park for clues.

The teen's arrest came hours after police released CCTV images of a man in a grey hooded jumper. Homicide Squad Detective Inspector Andrew Stamper told a media conference on Thursday that the alleged killer "surrendered himself" after the images were shared by the press.

He said the images were taken "in the Melbourne CBD" but would not reveal the exact time or location. He said the images were not captured in Carlton North.

Inspector Stamper also ruled out any link between the Carlton North attack and a second incident in nearby Parkville on March 28.

EARLIER: A TEENAGER has been arrested following the death of a woman who was found in a park in inner Melbourne.

Emergency services were called to a field between Royal Parade and Princes Park Drive about 2.40am yesterday after the body of a woman was discovered by a passer-by.

Paramedics worked on the woman but she was not able to be revived.

The woman is yet to be formally identified but is believed to be aged in her 20s.